orelang.operator.AssertOperator source code

1 module orelang.operator.AssertOperator;
2 import orelang.operator.IOperator,
3        orelang.Engine,
4        orelang.Value;
5 
6 class AssertOperator : IOperator {
7   /**
8    * call
9    */
10   public Value call(Engine engine, Value[] args) {
11     Value evaled = engine.eval(args[0]);
12     bool flag;
13 
14     switch (evaled.type) with (ValueType) {
15       case Bool:
16         flag = evaled.getBool;
17         break;
18       case Numeric:
19         flag = cast(bool)evaled.getNumeric;
20         break;
21       default:
22         flag = true;
23         break;
24     }
25 
26     if (!flag) {
27       throw new Exception("Assertion failed: " ~ args[0].toString);
28     }
29 
30     return new Value(true);
31   }
32 }